Helicopter Sikorsky H-19D-3 Serial 55-973 Register 55-3221 used by US Army Aviation Army. Built 1956. Aircraft history and location Aircraft History 55-3221 US Army Aviation 1956-06-05Sikorsky S-55 c/n 55-973, ff:? del US Army as H-19D-3, 55-3221, 05Jun56. 1962-09-18 18sep62 redesig UH-19D at Army Aviation Museum by 10/95 2016-03 preserved on displayed at the Army Aviation Museum by Mar16 Send Updates Use APP to upload photo @ (optional) When Now? / / Send